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<H1>IBM Visualization Data Explorer Programmer&#39;s Reference</H1>
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<H2><A NAME="HDRTIMG" HREF="progu055.htm#PToC_124">13.2 Timing</A></H2>
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<P>
The following routines involve "time marks," used as the basis
for measuring performance characteristics of the system.
<TABLE CELLPADDING="3">
<TR VALIGN="TOP"><TD><P><B><TT><STRONG>DXMarkTime()
<BR>
void DXMarkTimeLocal();</STRONG></TT>
</B></TD><TD><P>Record the times of various events in system operation
(e.g., the beginning and the end of module execution).
Time marks are batched until <TT><STRONG>DXPrintTimes()</STRONG></TT> is
called.
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See  <A HREF="progu241.htm#HDRDXMT">DXMarkTime, DXMarkTimeLocal</A>.
</TD></TR><TR VALIGN="TOP"><TD><P><B><TT><STRONG>void
DXPrintTimes()</STRONG></TT>
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</B></TD><TD><P>Prints time marks.
The accumulation and printing of timing messages must be enabled by
<TT><STRONG>DXTraceTime()</STRONG></TT>.
See  <A HREF="progu268.htm#HDRDXPT">DXPrintTimes</A>.
</TD></TR><TR VALIGN="TOP"><TD><P><B><TT><STRONG>void
DXTraceTime()</STRONG></TT>
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</B></TD><TD><P>Enables or disables the accumulation of time marks.
See  <A HREF="progu333.htm#HDRDXTT">DXTraceTime</A>.
<P><B>Note: </B>For modules linked to Data Explorer, the Trace module enables
the
recording and printing of times
(see <A HREF="refgu008.htm#HDRMDA">Chapter 1. "Data Explorer Tools"</A>
in <I>IBM Visualization Data Explorer User&#39;s Reference</I>).
</TD></TR><TR VALIGN="TOP"><TD><P><B><TT><STRONG>double
DXGetTime()</STRONG></TT>
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</B></TD><TD><P>Returns the elapsed time (in seconds) since system
initialization.
See  <A HREF="progu204.htm#HDRDXGT">DXGetTime</A>.
</TD></TR></TABLE>
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